public class Transpose {

public static void main(String[] args) {

    // create N-by-N matrix
    int N = Integer.parseInt(args[0]);
    int[][] a = new int[N][N];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            a[i][j] = N*i + j;
        }
    }

    // print out initial matrix
    System.out.println("Before");
    System.out.println("------");
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            System.out.printf("%4d", a[i][j]);
        }
        System.out.println();
    }

    // transpose in-place
    for (int i = 0; i < N; i++) {
        for (int j = i+1; j < N; j++) {
            int temp = a[i][j];
            a[i][j] = a[j][i];
            a[j][i] = temp;
        }
    }

    // print out transposed matrix
    System.out.println();
    System.out.println("After");
    System.out.println("------");
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            System.out.printf("%4d", a[i][j]);
        }
        System.out.println();
    }

}

}

import java.util.*;

public class Transpose {
        public static void main(String[] args) throws Exception {
                int rows, cols;
                int[][] matrix, tmatrix;
                Scanner input = new Scanner(System.in);
                System.out.print("Enter number of rows: ");
                rows = input.nextInt();
                System.out.print("Enter number of columns: ");
                cols = input.nextInt();
                matrix = new int[rows][cols];
                tmatrix = new int[cols][rows];
                System.out.println("Enter elements for Matrix");
                for (int i = 0; i < rows; i++) {
                        for (int j = 0; j < cols; j++) {
                                matrix[i][j] = input.nextInt();
                        }
                }
                for (int i = 0; i < rows; i++) {
                        for (int j = 0; j < cols; j++) {
                                tmatrix[i][j] = matrix[j][i];
                        }
                }
                System.out.println("Matrix is:");
                for (int i = 0; i < rows; i++) {
                        for (int j = 0; j < cols; j++) {
                                System.out.print(matrix[i][j] + " ");
                        }
                        System.out.println();
                }
                System.out.println("Its transpose is: ");
                for (int i = 0; i < cols; i++) {
                        for (int j = 0; j < rows; j++) {
                                System.out.print(tmatrix[i][j] + " ");
                        }
                        System.out.println();
                }
        }
}